Vortex 1200D Super Heavy DUTYGREY/Gray 18' Ultra 3 Pontoon/Deck Boat Cover,Includes Support System FITS 16'1" 17' 18' FT Long Deck Area, UP to 102" Beam

This is our most rugged and heavy duty cover yet. It is the best of the best. You spend good money on your boat....fuel, oil, maintenance, repairs, etc, and it is well worth it. It is part of the pride of boat ownership, and we understand that. We are boat people, too! This cover offers an upgrade over our 600d Ultra3 cover, in that the material is thicker and heavier duty. These are for folks that want the best cover that they can get. It is difficult to judge or predict how heavy duty a boat cover is, as there just are so many factors. But, the key factor is the 'd' or 'denier' 'rating'. Denier is a direct indicator of the thickness of the material. Therefore, it is an indirect (but accurate) indicator of how 'heavy duty' the cover is. Now, the industry standard seems to be 200d or 300d. You will even see some 150d covers. These lighter duty covers are generally what the big box retail stores, mass merchandisers, and huge marine mail order outfits sell. We do not take that approach. The 'd' or 'denier' rating is much like a thread count on a bed sheet. The higher the number, the thicker and heavier the material. Preventative maintenance often seems expensive, but it almost always more than pays for itself quickly. As a preventative maintenance tool, these cannot be beaten. These are waterproof, and 100% UV proof. The idea of having a waterproof cover is important, but the UV protection is almost always more important. It is designed to keep water out, as it is WATERPROOF. Yet, water vapor can permeate it, so it will keep moisture out, but will not keep moisture in! 1- These are very waterproof. These will collect water. Use some type of support to hold it up so water will not collect on it. You can trailer with it, but you have to eliminate the movement of the cover. That is nearly impossible, and it is generally better not to trailer with this or any cover.